<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>用户管理</el-breadcrumb-item>
      <el-breadcrumb-item>用户列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card>
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input 
            placeholder="请输入内容"
            v-model="queryInfo.query"
            clearable
            @clear="getUserList"
          >
            <el-button 
              slot="append" 
              icon="el-icon-search"
              @click="getUserList"
            >
            </el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
            <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
        </el-col>
      </el-row>
    

      <!-- 用户列表区域 -->
      <el-table
        :data="userlist"
        style="width: 100%"
        border
        stripe
      >
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="username" label="姓名" ></el-table-column>
        <el-table-column prop="email" label="邮箱" ></el-table-column>
        <el-table-column prop="mobile" label="电话" ></el-table-column>
        <el-table-column prop="role_name" label="角色" ></el-table-column>

        <el-table-column prop="mg_state" label="状态" >
          <template slot-scope="scope">
            <!-- {{ scope.row }} -->
            <el-switch 
              v-model="scope.row.mg_state"
              @change="userStateChange(scope.row)"
              >
            </el-switch>
          </template>
        </el-table-column>

        <el-table-column label="操作" >
          <!-- 因为没有引用，会报错，所以删除了值 scope -->
          <template slot-scope="scope">
            <!-- 修改按钮 -->
              <el-button 
                type="primary" 
                icon="el-icon-edit" 
                circle 
                size="medium "
                @click="showEditDialog(scope.row.id)"
              ></el-button>
            <!-- 分配角色按钮 -->
             <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                <el-button 
                  type="warning" 
                  icon="el-icon-setting" 
                  circle 
                  size="medium "
                  @click="setRole(scope.row)"
                ></el-button>
            </el-tooltip>
            <!-- 删除按钮 -->
              <el-button 
                type="danger" 
                icon="el-icon-delete" 
                circle 
                size="medium "
                @click="removeUserById(scope.row.id)"
              ></el-button>
          </template>
        </el-table-column>

      </el-table>


      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[1, 2, 5, 10]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>

    </el-card>


    <!-- 添加用户的对话框 -->
    <el-dialog
        title="添加用户"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
        >
        <!-- 内容主体区域 -->
        <el-form 
          :model="addForm" 
          :rules="addFormRules" 
          ref="addFormRef" 
          label-width="70px" 
        >
          <el-form-item label="用户名" prop="username">
            <el-input v-model="addForm.username"></el-input>
          </el-form-item>
          <el-form-item label="密码" prop="password">
            <el-input v-model="addForm.password"></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="addForm.email"></el-input>
          </el-form-item>
          <el-form-item label="电话" prop="mobile">
            <el-input v-model="addForm.mobile"></el-input>
          </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
          <el-button @click="addDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addUser">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 修改用户的对话框 -->
    <el-dialog
        title="修改用户"
        :visible.sync="editDialogVisible"
        width="50%"
        @close="editDialogClosed"
      >
        <el-form 
          :model="editForm" 
          :rules="editFormRules" 
          ref="editFormRef" 
          label-width="70px" 
        >
          <el-form-item label="用户名">
            <el-input v-model="editForm.username" disabled></el-input>
          </el-form-item>
          <el-form-item label="邮箱" prop="email">
            <el-input v-model="editForm.email"></el-input>
          </el-form-item>
          <el-form-item label="手机" prop="mobile">
            <el-input v-model="editForm.mobile"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editUsersInfo">确 定</el-button>
        </span>
    </el-dialog>

    <!-- 分配角色的对话框 -->
    <el-dialog
      title="分配角色"
      :visible.sync="setRoleDialogVisible"
      width="50%"
      @click="setRoleDialogClosed"
      >
      <div>
        <p>当前的用户： {{ userInfo.username }} </p>
        <p>当前的角色： {{ userInfo.role_name }} </p>
        <p>分配新角色：
          <el-select v-model="selectedRoleId" placeholder="请选择">
            <el-option
              v-for="item in rolesList"
              :key="item.id"
              :label="item.roleName"
              :value="item.id">
            </el-option>
          </el-select>
        </p>
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRoleDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
      </span>
    </el-dialog>

          
  </div>
</template>

<script>
export default {
  data() {

    // 验证邮箱的规则
    var checkEmail = (rule, value, callback) => {
      // 验证邮箱的正则表达式
      const regEmail = /^[A-Za-z0-9_-]+@([A-Za-z0-9_-])+(\.[A-Za-z0-9_-])+/

      if(regEmail.test(value)) {
        // 合法邮箱
        return callback()
      }

      callback(new Error('请输入合法的邮箱'))
    }

    // 验证手机号的规则
    var checkMobile = (rule, value, callback) => {
      //验证手机号的正则表达式
      const regMobile = /^(0|86|17951)?(13[0-9]|15[0123456789]|17[678]|18[0-9]|14[57])[0-9]{8}$/

      if(regMobile.test(value)) {
        return callback()
      }

      callback('请输入合法的手机号')
    }


    return {
      // 获取用户列表的参数对象
      queryInfo: {
        query: '',
        // 当前的页数
        pagenum: 1,
        // 当前每页显示多少条数据
        pagesize: 2
      },
      userlist: [],
      total: 0,
      // 控制添加用户对话框的显示和隐藏
      addDialogVisible: false,
      // 添加用户的表单数据
      addForm: {
        username: '',
        password: '',
        email: '',
        mobile: ''
      },
      // 添加表单的验证规则对象
      addFormRules: {
        username: [
          {
            required: true,
            message: '请输入用户名', 
            trigger: 'blur'
          },
          {
            min: 3,
            max: 10,
            message: '用户名的长度在3~10个字符之间',
            trigger: 'blur'
          },
        ],
        password: [
          {
            required: true,
            message: '请输入密码', 
            trigger: 'blur'
          },
          {
            min: 6,
            max: 15,
            message: '密码的长度在6~15个字符之间',
            trigger: 'blur'
          },
        ],
        email: [
          {
            required: true,
            message: '请输入邮箱', 
            trigger: 'blur'
          },
          {
            validator: checkEmail,
            trigger: 'blur'
          }
        ],
        mobile: [
          {
            required: true,
            message: '请输入电话', 
            trigger: 'blur'
          },
          {
            validator: checkMobile,
            trigger: 'blur'
          }
        ]
      },
      // 控制修改用户对话框的显示与隐藏
      editDialogVisible: false,
      // 查询到的用户信息对象
      editForm: {},
      // 修改表单的验证规则对象
      editFormRules: {
        email: [
          {
            required: true,
            message: '请输入邮箱',
            trigger: 'blur'
          },
          {
            validator: checkEmail,
            trigger: 'blur'
          }
        ],
        mobile: [
          {
            required: true,
            message: '请输入合法的手机号',
            trigger: 'blur'
          },
          {
            validator: checkMobile,
            trigger: 'blur'
          }
        ],

      },
      // 控制分配角色对话的显示与隐藏
      setRoleDialogVisible: false,
      // 需要被分配角色的用户信息
      userInfo: {}, 
      // 所有角色的数据列表
      rolesList: [],
      // 已选中的角色 id 值
      selectedRoleId: '',

    }
  },
  created() {
    this.getUserList()
  },
  methods: {
    async getUserList() {
      const { data: res } = await this.$http.get('users', { 
        params: this.queryInfo 
      })
      if(res.meta.status !== 200) {
        return this.$message.error('获取用户列表失败！')
      }
      this.userlist = res.data.users
      this.total = res.data.total
      console.log(res)
    },

    // 监听 pagesize 改变的事件
    handleSizeChange(newSize) {
      // console.log(newSize)
      this.queryInfo.pagesize = newSize
      this.getUserList()
    },
    // 监听 页码值 改变的事件
    handleCurrentChange(newPage) {
      // console.log(newPage)
      this.queryInfo.pagenum = newPage
      this.getUserList()
    },

    // 监听 switch 开关状态的改变
    async userStateChange(userinfo) {
      console.log(userinfo)
      const {data: res} = await this.$http.put(`
        users/${userinfo.id}/
        state/${userinfo.mg_state}
      `)
      if(res.meta.status !== 200) {
        // 不知道为什么总是返回 404，可能是接口改变了
        console.log(res.meta.status)
        userinfo.mg_state = !userinfo.mg_state
        return this.$message.error('更新用户状态失败！')
      }
      this.$message.success('更新用户状态成功！')
    },

    // 监听添加用户对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    },

    // 点击按钮，添加新用户
    async addUser() {
       this.$refs.addFormRef.validate(async valid => {
        //  console.log(valid)
        if(!valid) {
          return
        }
        // 可以发起添加用户的网络请求
        const {data: res} = await this.$http.post('users', this.addForm)

        if(res.meta.status !== 201) {
          this.$message.error('添加用户失败！')
        }

        this.$message.success('添加用户成功！')
        // 隐藏添加用户的对话框
        this.addDialogVisible = false
        // 重新获取用户列表数据
        this.getUserList()
       })
    },

    // 展示编辑用户的对话框
    async showEditDialog(id) {
      // console.log(id)
      this.editDialogVisible = true

      const {data: res} = await this.$http.get('users/' + id)
      
      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败！')
      }
      
      this.editForm = res.data
    },

    // 监听修改用户对话框的关闭事件
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },

    // 修改用户信息并提交
    async editUsersInfo() {
      this.$refs.editFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) {
          return
        }
        // 发起修改用户信息的数据请求
        const { data: res } =await this.$http.put(
          'users/' + this.editForm.id, 
          {
            email: this.editForm.email,
            mobile: this.editForm.mobile,
          }
        )

        if(res.meta.status !== 200) {
          // console.log(res.meta.status)
          return this.$message.error('更新用户信息失败！')
        }

        // 关闭对话框
        this.editDialogVisible = false
        // 刷新数据列表
        this.getUserList() 
        // 提示修改成功
        this.$message.success('更新用户信息成功！')
      })
    },

    // 根据id删除对应的用户信息
    async removeUserById(id) {
      // console.log(id)

      // 弹窗询问用户是否删除数据
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?', 
        '提示', 
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => {
        return err
      })

      // 如果用户确认删除，则返回值为字符串 confirm
      // 如果用户取消了删除，则返回值为字符串 cancel
      // console.log(confirmResult)
      if(confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }

      // console.log('确认删除')
      const {data: res} = await this.$http.delete('users/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('删除用户失败！')
      }

      this.$message.success('删除用户成功！')
      this.getUserList()
    },

    // 展示分配角色的对话框
    async setRole(userinfo) {
      this.userInfo = userinfo

      // 在展示对话框之前，获取所有角色的列表
      const { data: res } = await this.$http.get('roles')

      if(res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败！')
      }

      this.rolesList = res.data
      
      this.setRoleDialogVisible = true
    },

    // 点击按钮，分配角色
    async saveRoleInfo() {
      if(!this.selectedRoleId) {
        return this.$message.error('请选择要分配的角色！')
      }

      const { data: res } = await this.$http.put(
        `users/${this.userInfo.id}/role`, 
        {
          rid: this.selectedRoleId
        }
      )

      if(res.meta.status !== 200) {
        return this.$message.error('更新角色失败！')
      }

      this.$message.success('更新角色成功！')
      this.getUserList()
      this.setRoleDialogVisible = false
    },

    // 监听分配角色对话框的关闭事件
    setRoleDialogClosed() {
      this.selectedRoleId = ''
      this.userInfo = {}
    }
  },
}
</script>

<style lang="less" scoped>
</style>